对某些金属和类金属按一定比例在高温下熔融混合,并急速冷却,可以得到性能极为特殊的非晶态金属。我们根据高聚物转变理论,用研究高聚物的扭辫仪、线膨胀仪,再结合DSC和X射线衍射仪,对非晶态金属[Fe_(0.1)Ni_(0.35)Co_(0.55)]_(78)Si_8B_(14),[Fle_(0.1)Ni_(0.30)Co_(0.55)Mo_(0.05)]_(78)Si_8B_(14)和[Fe_(0.1)Ni_(0.30)Co_(0.55)Nb_(0.05)]_(78)Si_8B_(14)的玻璃化转变及晶化转变的自由体积、激活能、内耗与热效应等进行了研究,观测到玻璃化温度及晶化温度、玻璃化转变激活能及晶化激活能均与合金元素原子半径有关,转变时的热效应与内耗峰值有一定的对应关系。讨论了玻璃化转变及晶化转变的机理,可供设计非晶态金属时参考。
The glass and crystal transition temperatures, T_g and T_c, the free volume, the activation energy and the enthalpy change at T_g and T_c of the following noncrystalline glasses: (Fe_(0.1)Ni_(0.35)Co_(0.55))_(78)Si_8B_(14), (Fe_(0.1)Ni_(0.30)Co_(0.55)Mo_(0.05))_(78)Si_8B_(14) and (Fe_(0.1)Ni_(0.30)Co_(0.55)Nb_(0.05))_(78)Si_8B_(14) were studied by applying the conception of transition theory used in polymer science with torsional braid analyzer, linear expansion apparatus, DSC and X-ray diffraction technique. The T_g and T_c as well as the activation energy of glass transition are all increased with the increase of atomic radius of the extra metal added, but the activation energy of crystallization is in opposite way. A correlation between the enthalpy change and the peak of damping was also observed. The above results may be valuable to the non-crystalline glass designer.
参考文献
| [1] | |
| [2] | |
| [3] | |
| [4] | |
| [5] | |
| [6] | |
| [7] | |
| [8] | |
| [9] | |
| [10] | |
| [11] | |
| [12] | |
| [13] | |
| [14] | |
| [15] | |
| [16] | |
| [17] | |
| [18] | |
| [19] | |
| [20] | |
| [21] | |
| [22] | |
| [23] | |
| [24] | |
| [25] | |
| [26] | |
| [27] | |
| [28] | |
| [29] | Masumoto, T. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%